OnionLock

OnionLock allows you to use an email address and a (very, very!) long password or phrase to create a unique ID in which your friends, family, or other people can encrypt files to. There are no other keys to manage, you only have to remember your email and password/phrase. This ID is portable: you can use the same email and password/phrase combination across all platforms and devices.* There is no central server, and no login data needs to be sent anywhere.